IntensIve sIlvIculture - Forest Science Labs - Research Network ...

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planting operations – is included as a keyword for publications that examine any aspect seedling
outplanting. This includes initial spacing trials, studies that investigate planting techniques, inoculation of
planting holes, underplanting of seedlings beneath overstories, or interplanting of Douglas-fir seedlings
with other tree species.
precommercial thinning - is included as a keyword under thinning for publications that examine
thinning treatments of Douglas-fir stands to achieve silvicultural objectives, but where no merchantable
timber is produced from the treatments. This keyword is included only if it could be conclusively
determined from the abstract that the thinning was a precommercial thinning.
prescribed fire – is included as a keyword under site preparation for publications that examine the use
of deliberate and controlled burning to modify and prepare the site in preparation for planting. This
includes both broadcast burning and pile and burning.
pruning – is included as a keyword for publications that examine responses due to the removal of side
branches or multiple leaders from standing trees to achieve certain silvicultural objectives.
release treatments – is included as a keyword for publications that investigate treatments aimed at
favouring the growth of Douglas-fir by controlling unwanted vegetation. Unlike chemical preparation,
release treatments and the sub-keywords under release treatments refer specifically to vegetation
management treatments applied once the seedlings are already in the ground. This keyword also applies to
treatments applied in mature stands if the purpose is to improve the growth of Douglas-fir trees (e.g.
hardwood thinning). Sub-keywords under release treatments: chemical release, and manual release.
seed orchard management – is included as a keyword for publications that examine management
practices dealing with the actual mechanics of seed production in a seed orchard. This includes parent-tree
and seed protection treatments, or parent-tree cultural treatments aimed at increasing flowering and
pollination rates, seed yield, health, and viability.
site preparation – is included as a keyword for publications that examine site manipulations, either
mechanical, chemical, or fire, in preparation for planting of seedlings. Sub-keywords under site
preparation: mechanical preparation, chemical preparation, and prescribed fire.
thinning – is included as a keyword for publications that examine the use of stand density management
(with the exception of initial density, which falls under planting operations) to achieve silvicultural
objectives. Included with this keyword are publications that study tree or stand response to varying
thinning methods, thinning regimes, or thinning intensities. Sub-keywords under thinning:
precommercial thinning, and commercial thinning.
tree grafting – is included as a keyword under genetic tree improvement for publications that examine
tree grafting in seed orchards. If grafting compatibility is a response measured, then it is included under
the response category of tree/stand health.
tree/stand protection – is included as a keyword for publications that implement silvicultural treatments
with the purpose of studying their effect on biotic or abiotic threats to Douglas-fir, or on the change in
Douglas-fir response to these threats. This keyword is included for publications that examine treatments
aimed directly at protecting a tree or stand. It is also included for publications that examine the use of
another silvicultural treatment such as thinning or genetic tree improvement, to achieve tree or stand
protection objectives.